Particularly unattractive girls that show up to a party with the intention of getting a guy drunk and having her way with him. Their desperation and foul appearance earn them the name, "Dick Troll".
Any guy that takes a piss next to you when there are five empty urinals just to take a peek at your junk. Or, a male/female prison guard that goes from cell to cell watching inmates jerk-off.
See that fucking Dick Watcher over there. He looked at my package and then winked.